]> https://gitweb.dealii.org/ - dealii.git/commitdiff
Add changelog 4587/head
authorMartin Kronbichler <kronbichler@lnm.mw.tum.de>
Tue, 11 Jul 2017 06:42:15 +0000 (08:42 +0200)
committerMartin Kronbichler <kronbichler@lnm.mw.tum.de>
Fri, 14 Jul 2017 12:29:28 +0000 (14:29 +0200)
doc/news/changes/major/20170711MartinKronbichler-b [new file with mode: 0644]
doc/news/changes/minor/20170711MartinKronbichler [new file with mode: 0644]

diff --git a/doc/news/changes/major/20170711MartinKronbichler-b b/doc/news/changes/major/20170711MartinKronbichler-b
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+Improved: The constructor of MappingQGeneric used a naive inversion of a cell
+Poisson matrix, which became very slow for high approximation degrees in
+3D. The implementation has been switched to the fast diagonalization method
+implemented by TensorProductMatrixSymmetricSum.
+<br>
+(Martin Kronbichler, 2017/07/11)
diff --git a/doc/news/changes/minor/20170711MartinKronbichler b/doc/news/changes/minor/20170711MartinKronbichler
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+New: A new class TensorProductMatrixSymmetricSum that represents a tensor
+product of a mass and derivative matrix has been added. It implements both the
+matrix-vector operation (TensorProductMatrixSymmetricSum::vmult()) as well as
+the inverse operation (TensorProductMatrixSymmetricSum::apply_inverse())
+operation in tensorial form with optimal complexity of
+<tt>size<sup>dim+1</sup></tt> operations. The inverse operation uses the fast
+diagonalization method.
+<br>
+(Martin Kronbichler, 2017/07/11)

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